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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.16695 |
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| _version_ | 1866918107548745728 |
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| author | Abouelela, Aya Turaev, Michael Kramer, Roman Janning, Moritz Kajan, Michael Ray, Sayak Kroha, Johann |
| author_facet | Abouelela, Aya Turaev, Michael Kramer, Roman Janning, Moritz Kajan, Michael Ray, Sayak Kroha, Johann |
| contents | We study the temporal, driven-dissipative dynamics of open photon Bose-Einstein condensates (BEC) in a dye-filled microcavity, taking the condensate amplitude and the noncondensed fluctuations into account on the same footing by means of a cumulant expansion within the Lindblad formalism. The fluctuations fundamentally alter the dynamics in that the BEC always dephases to zero for sufficiently long time. However, a ghost-attractor, although it is outside of the physically accessible configuration space, attracts the dynamics and leads to a plateau-like stabilization of the BEC for an exponentially long time, consistent with experiments. We also show that the photon BEC and the lasing state are separated by a true phase transition, since they are characterized by different fixed points. The ghost-attractor nonequilibrium stabilization mechanism is alternative to prethermalization and may possibly be realized on other dynamical platforms as well. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_16695 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stabilizing open photon condensates by ghost-attractor dynamics Abouelela, Aya Turaev, Michael Kramer, Roman Janning, Moritz Kajan, Michael Ray, Sayak Kroha, Johann Quantum Gases Quantum Physics We study the temporal, driven-dissipative dynamics of open photon Bose-Einstein condensates (BEC) in a dye-filled microcavity, taking the condensate amplitude and the noncondensed fluctuations into account on the same footing by means of a cumulant expansion within the Lindblad formalism. The fluctuations fundamentally alter the dynamics in that the BEC always dephases to zero for sufficiently long time. However, a ghost-attractor, although it is outside of the physically accessible configuration space, attracts the dynamics and leads to a plateau-like stabilization of the BEC for an exponentially long time, consistent with experiments. We also show that the photon BEC and the lasing state are separated by a true phase transition, since they are characterized by different fixed points. The ghost-attractor nonequilibrium stabilization mechanism is alternative to prethermalization and may possibly be realized on other dynamical platforms as well. |
| title | Stabilizing open photon condensates by ghost-attractor dynamics |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2503.16695 |